Figure 5

¹³C-NMR spectrum of catechins and proanthocyanidins from leaf (A) and root (B) extracts of tea plant in acetone-d₆/D₂O. term, terminal unit; ext, extension unit; top, top unit; mono, monomeric catechins; di, dihydroxyl groups in the B-ring; tri, trihydroxyl groups in the B-ring.